meaning of impossibility
1.  The quality of being impossible; impracticability. 
2.  An impossible thing; that which can not be thought, done, or endured. 
3.  Inability; helplessness. 
4.  an alternative that is not available
						 
1.  The quality of being impossible; impracticability. 
2.  An impossible thing; that which can not be thought, done, or endured. 
3.  Inability; helplessness. 
4.  an alternative that is not available